SWAROVSKI XIRIUS (art. 2078) Flat Back Hotfix StoneHot fix crystals work well with most absorbent fabrics. Leathers and plastics are not recommended. A simple water drop test will tell you whether your chosen material is compatible. Simply drop a bit of water onto the fabric; if the water is absorbed then you're good to go. If the water beads up, then the fabric will not absorb the glue. The unique glue of a SWAROVSKI Hot Fix stone allows the benefit of flexible range of application temperatures from 250°F to 340°F (120°C to 170°C). The temperature, application time, and pressure can be varied depending upon the material chosen. Always apply over a hard even surface. Ironing boards are not recommended. Do not use an iron with steam vents. Use a pad between the iron and the crystals. If using an application tool, select a tip to match the size of your crystal. Position crystal on carrier material, which should be resting on a solid base. Press the adapter firmly onto the crystal at a right angle to activate the device.Swarovski® is the premium brand for the finest crystal embellishments since 1895. Available in a myriad of colors, effects, shapes, and sizes, crystals from Swarovski offer a fabulous palette of inspiration, and are produced according to the innovative, lead-free* Advanced Crystal standard.*Crystal glass and all other materials containing 0.009% lead or less.